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经营范围
发明名称
Improvements in or relating to cathodes for electric discharge tubes
摘要
申请公布号
GB709274(A)
申请公布日期
1954.05.19
申请号
GB19510001229
申请日期
1951.01.16
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT;WITTELBACHER PLATZ
发明人
分类号
H01J1/16
主分类号
H01J1/16
代理机构
代理人
主权项
地址
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